The EC made the scientific claim that the hormones used in treating cattle remain in the tissue, specifically the hormone, 17-beta estradiol .  However, despite this evidence the EC declared there was no clear link to health risks in humans for the other five provisionally banned hormones. The EC has also found high amounts of hormones in areas where there are dense cattle lots. This increase in hormones in the water has affected waterways and nearby wild fish.  Contamination of North American waterways by hormones would not, however, have any direct impact on European consumers or their health.